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if not modules then modules = { } end modules ['libs-imp-lzma'] = {
version = 1.001,
comment = "companion to luat-lib.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- Instead of linking in libs like this we now do them optional. After all, once
-- we start adding more and more stuff statically we en dup with a mess.
local libname = "lzma"
local libfile = "liblzma"
local lzmalib = resolvers.libraries.validoptional(libname)
if not lzmalib then return end
local lzma_compress = lzmalib.compress
local lzma_decompress = lzmalib.decompress
local function okay()
if resolvers.libraries.optionalloaded(libname,libfile) then
okay = function() return true end
else
okay = function() return false end
end
return okay()
end
local lzma = {
compress = function (...) return okay() and lzma_compress (...) end,
decompress = function (...) return okay() and lzma_decompress (...) end,
}
package.loaded[libname] = lzma
-- local raw = io.loaddata("e:/luatex/luametatex-source.tar")
-- local old = io.loaddata("e:/luatex/luametatex-source.tar.xz")
-- local new = lzma.decompress(old)
-- local xz1 = lzma.compress(raw,9)
-- local xz2 = lzma.decompress(xz1)
-- print("raw",raw and #raw)
-- print("old",old and #old)
-- print("new",new and #new)
-- print("chk",new == raw)
-- print("xz1",xz1 and #xz1)
-- print("xz2",xz2 and #xz2)
-- print("chk",xz2 == raw)
return lzma
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